Phonograph



l 1. HOFFAY'.

I PHONOGRAPH. `APPL1cAT1oN F1LEDY1UNE1. 1916. RENEwED m1. 16.19.22.

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J. HOFFAY.

. PHONOGRAPH.

APPucATloN FILED .JUN-E 7. 1916. RENEwED JAN. 1o,1922.

Patented Aug. 15, 1922.

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I JOSEPI HOFQFA'Y, OF NEW YORK, N.

Specification of Letters Paten-t.y Patented 15,v 1922 "Application mea rune 7, 191e, serial No. 102,189; Renewed January 1o, 1922. serial No. '528,139.

To all whom it my concern Be it known that I, JOSEPH I-IorFA'YdfaV citizen of the Republic of Mexico, and a resident of New York, in the county ofNew York and State of New York, have invented certain new and useful'lmprovements in Phonographs, of which the following is a specification.

M-y invention relates to phonographs, particularly ofthe built-in horn type, and one of the mainvl objects thereof is lto provide` meansI for` preventing the escape of sound waves at any point betweenthe sound box i ent insulation; ,35

and the out!er end of the horn while at the same time4 allowing full freedom of movement to the tone arm during reproduction.

Another Objectis to accomplish this result by.. permanent means instead of the present .eluncleanly and temporary method of utilizing liquids' or grease to obtain airl tight connections. I l,

Another object'is to provide tone arm sup.-

.porting means .over a relatively great sur- Yface and in such mannerlas to take .the weight of the tone arm, during therendi# tion Vof a record, in a positive and untiltingv way, whereby -strains are avoided to the' delicate mechanisrmfull freedom of move-A ment results for thet'one arm, and any tendency to vibrate is avoided.

Another object is to provide means preventing the transmission offvibration to the' tone arm `from Another objectis to simple practical means for connecting the jtone arm andfhorn with the .cabiinet whereby the assembling. is expeditiousy accomplished and without the needof `a skilledworkman, it being possible/ to so vassemble the parts in only one way, and that-of the maximum functional eficiene'y,l in rep roductmn.-

further Objectis to provide-f a 4diahrgrh y the-purity4 vand n'aturalnfe'pss of tones; are

i .Another object'l 'isfl'to:provide-tone' arm I supporting means whereby thegaXis-of II'QYement in-'a verticalplane'will traverse the airis ofy lmovement ein; l a horizontal plane, 1 thereby ensuring u1'ilti'ictedl movement on linesof least resistance'.- 'l *Y A A l My inventiony is fully described in the following epeeifieee'em 'ef -Whieh l the eeeem-.f panyi'ng drawings -form a part, in iwh'ioh4 the motor, asby res'ili-v f for thel outer endof the-hornv where? jlike characters refer to-.lileparts in each ofl the views, and in which F1g.'l is a .vertical 'section through ral phonograph embodylng my severalfeaturesf v v GQ as on the 1ine-11 of Fig.,2; A

Fig. 2 is asimilar 'section taken-on the l1ne22ofFig;l; i" i' Fig.v 3 is an'enlargedfseotion, fragmentaf' rily, through the horn which I employ, as on the line 3 3 of Fig. 2; w I y Fig. 4 is a bottom plan vlew of the-upperhorn member, as on the line of Fig. v3;

Fig.r 5 -is a top plan view of thelower Ihorn member, as on the line. 5- 5 of'Fig, 3.; 'i

Referringto the,l drawings, 8 represents a cabinet havinga hinged top 9 normally rclosing a chamber 10, having a pluralityfof I y l vrecord storing shelves 11 adjacer'ii'.vl theltop. `,of the cabinet and protected by' adoor 12,A

having'a grill 13 at the lowerfr'ont'through which the sounds pass, having a removable back 14, and having a recordtable 15 and' 'a 'motor therefor ,enclosed-in va'lboX 16, the position ofthe grill 13 being a marked char:

, 'acteristic of my phonograph.

. The cabinet Ais, provided,withlaifshelfilfl supporting therecord `table and fthe. motor, and serving alsov asA asupport for the horn .18 and Afor the tone arm 19 having a sound.. box 20 at'its outer end, the horn 18 being ,rigidly 'held but the tone varmv beingffreely movable 'in both vertical vand' .horizonta1 planes whereby the stylusfmayz, follow the groove .in ar record.

,The horn is` composedglof' a'vreplatively l small cylindrical Aupperend21,1-a downwardly `larin g." member.522.v leading therefrom, and 'a y'forwardly -dire'ztedl memberv 231 `secured thereto byQflangeszQe-fand 25 and bolts 26;, the "member 22 being arrangedwith? the' rner'x'lber .2 3 to avoid any shoulder, which might obstruct lthel movement of the soundwaves outwardly through the'horn,

e the .upp'eijendiiQl having a Aflange thereon 1 whereby,.tlie'llorn- 'may be secured in :posi- Y tion, 4as-'ljy bolts. QSVand-being' interiorly ythreaded-to.receive a tube v29 deending Ifroln anannulargplateBO also hel by the:

@j i. ,rasees bolts 28, rubber gaskets 31 and 32 being interposed between the plate and shelf 17 and between the saidl shelf and the flange 27, respectively. The gasket 31 is formed with an integral sleeve and flange whereby the tendency of the plate 30 and depending tube 29 to move vertically or horizontally is resisted in a cushioned manner, both these gaskets tending to maintain the tone arm and connecting means, as-we'll as the horn, free `from any vibrationsdue to motor operation, and I also provide a packing gasket 33 between the horn members 22 and 23.

The outer end of the horn member 23 is recessed to receive two telescoped frames 34 and 35 holdin a diaphragm 36 there between, said diap ragm extending entirely over the outer end of the horn and being substantially air-tight prevents the escape of sound waves from 4the horn through transmitting the action thereof to the outer air by. means of the diaphragm and, while lnuts 45, these pivots being .on an axial ferential groove 39, the former receiving a rib 40 on a tone arm carrier 41 resting squarely uponl the upper surface of the annular member 37, and the v-groove 39 receives screw 42 in desired position vto ensure against accidental displacement-of the carrier 41, several of these screws being pro'- vided, if desired, and being carried in a depending flange 43 on the carrier.

lThe carrier is provided .with two diamet.

rically opposite pivot screws 44 adjustable toward andvfrom the vertical axis of the carrier and locked in adjusted positions by plane of the carrier vrand of the `plate 30 thereunder and serving to carryv the -tone arm 19 to permit movement thereof .in avertical plane whereas the rotary carrier Apermits tone varm movement in a horizontal plane.- From the foregoingit. will be observed thatthe weight of theftonearm is supported by the 4relatively wide member 37- of the plate 30 whereby the tonearm carrier 'is maintainedv in horizontal position at a'll times with the consequent freedom of the tone arm to move on a horizon l plane about a vertical axis'traversing tliie horizontal Aaxis ofthe tone arm.

The carrier 41 is recessed in its lower inner surface to receive the upper end of a flexible annular member 46 and a locking ring 47, the lower end of said member 46 being held to the lower end ofthe vertical portion of the tone arm by means of a locking ring'48, this annular member preventing the passage of air upwardly around the sides of the tone arm though not intertering in any way with the movement of said tone arm on the pivots 44. `While a lubricant will probably be provided beneath the tone arm carrier and on the raised member 37 of the plate 30 there is no possibility of 'its reaching the flexible sleeve vor member `46 to cause the rubber of which it is formed to harden or to otherwise deteriorate. 1 1

As shown in Figs. 2 and 6, I provide a screw 49 extended rearwardly from the tone arm and provided with nuts 50 and 51 locked together but capable of axial adjust ment on said screw to serve as a counterweight for resisting' any tendency of the` tone arm to vibrate and also acting as brake against sudden vibratory movements of the tone arm about its vertical axis.

From the foregoing itwill be seen that the movement of the sound waves from the sound box to the end of the horn is entirely unobstructed, that there is no possibility of any escape thereof, andthat the relatively enormous capacity of the horn permits a volume of sound not possible with smaller horns, while the shape of the horn permits a gradual increase in volume from the tone arm outwardly. i

The above advantages and characteristic features have :been determined by actual reduction to practice and, while l have shown a preferred embodiment of the invention, l

may make changes in the details shown and described without `departing from the spirit of -my invention or-sacrificing its advantages, providedsuch changes come within the scope iof theappended claims.

. Havinglf'fully described my invention, what I claim as n'ew, and desire to secure by Letters Patent, is

1. In a. phonograph, the combination with a tone arm and a horizontally rotatable support in and upon which said tone arm is mounted to rock, .of a flexible sealing sleeve surrounding and fixed at one en d to said tonearm and fixed at its other end to said fixed ends so as not to interfere with the arm.

a'pivoted tone armand a stationary support 2. Inva'phen'ograph, the combination withv vsupport with sufficient slack between said y into which said tone arm extends, of a Hexrblesealing sleeve surrounding and fixed 'at V one end to said tone arm, and a member extending about said tone arm, jrtata b1y mounted upon-said support and to which the other end off said sleeve is fixed.

3. In a phonograph, the combination with a tone arm, of a rotatable ring into whichl said tone arm extends and upon which it is pivoted' to rock, of a supportffr said ring, one ofseid last mentioned parts having anann-ular groove concentric with the axis of rot 'tion' of said ring, the other of said parts 5- having an annular rib fitting intao-A said oove. n

4. 4An vail" vtight; phonograph construction "comprising an air tight sound Box and tone armar1d @a horn having an air tight', diaphrag'm sealin'gitsound delivery end, a11"10 joints between relatively movable parts be? ling also sealed air, tight. e JOSEPH HOFFAY., i 

